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The P-9801 series optometers are one of the most powerful light measurement instruments available for multiple light detector head applications.

For use in those applications the P-9801 features:


Industries most powerful and fastest multichannel light meter

  • simultaneous measurement of all eight detector channels
  • wide linear detector signal dynamic range
  • short rise time with variable sampling rate
  • fast multi-channel data-logging
  • manual and remote control operation
  • RS232 and IEEE488 interface
  • powerful 16 bit microprocessor with large memory
  • external trigger input with pre-trigger function

True eight-channel operation 

The P-9801 is a true eight-channel optometer desingned with eight photocurrent-to-voltage amplifiers (no multiplexing) and eight 12 bit highly linear analogue-to-digital converters (ADC) enabling signal sampling of all channels simultaneously.


Ten magnitudes dynamic current measurement range 

Each channel’s wide 0.1 pA to 2 mA signal range covers the dynamic range of most current semiconductor photodiodes for nearly unrestricted use in any light measurement application. The dynamic range is supported by 8 gain ranges each calibrated for 0.2 % precision.


Adjustable integration time 

The fast sampling rate of the P-9801 ADC enables an adjustable integration time of 1 ms up to 999 s formed by the average of multiple measurements with 100 µs integration time. This averaging feature support fast data logger measurements used in peak-to-peak, short pulse energy measurements and other modes.


Metal housing for use in strong electromagnetic environments 

The P-9801 features a high quality metal housing for best EMV shielding and rack mount option for protection in strong ambient electromagnetic environments, as in high power arc lamp measurement for example.


Three different versions for universal use in high speed applications 

P-9801-V01 is set-up with a gain dependent slew rate of 2 ms to 10 ms for universal light measurement purposes.
P-9801-V02 amplifier offers a gain range independent rise time for the pulse energy measurement of short light flashes using a pulse stretching method.
P-9801-V03 offers a fast rise time of 1 ms for high speed data logger applications with external trigger and pre-trigger function.


Measurement Range Specifications with Light Detectors

The measurement range of optometer combined with light detector is calculated by the measurement range specification of the optometer and the responsivity of the detector head as follows:

  • Offset signal 
    = Maximum Resolution = meter current offset signal / detector sensitivity
    Sample: 0.1 pA (0.1E - 12 A) / 3 nA/(mW/cm²) (irradiance detector) = 0.33 nW/cm²
  • Minimum measureable irradiation
    = offset signal * signal to noise ratio factor
    Sample: 0.33 nW/cm² * 50 = 17 nW/cm²
  • Maximum measureable irradiation *
    = max. signal current detector / detector sensitivity
    Sample: 1 mA (10E - 3 A) / 3 nA/(mW/cm²) = 333333 W/cm²
  • Display range
    = Offset signal to maximum measureable signal
    Sample: 0.33 nW/cm² to 333333 W/cm²
  • Measurement range
    = min measureable irradiation to maximum measureable irradiation
    Sample: 17 nW/cm² to 333333 W/cm²

*) The maximum measureable irradiation value may also be limited by thermal radiation, intense UV radiation or other application dependent parameters which must be considered by the end-user.

P-9801 Front
P-9801 Back
General
Short description

Powerful and fast multichannel optometer for a multitude of applications thanks to the large selection of different detectors.

Main features

simultaneous measurement of all eight detector channels, large linear dynamic range, short rise time with variable sampling rate, fast multi-channel data logging, manual or interface operation, powerful 16 bit microprocessor, trigger input with pre-trigger function. Three different versions available (different time constant).

Measurement range

depending on the detector, dynamic of 8 ranges available: 2,000 mA to 0,1 pA manuell or autorange

typical applications

Due to the large variety of different measuring heads suitable for a variety of applications

Calibration

Calibrate and adjust the current sensitivity in all eight gain levels. Memory for the calibration data of several measuring heads for the measurement in the absolute unit of the selected measuring head.

Product
Power Supply

(6.5 – 7.5) VDC / 1A
Plug: 5,5 / 2,5 mm / 10 mm

Detector interface

8 BNC sockets

Information: By color measurements four channels are needed for one detector, this is why two color channels are possible.

Trigger

CMOS level (0/5V) / BNC socket, internal pull-up 10 k to + 5 V

Analog output

± 2.5 V (max. + - 5 V), Ri = 100 R, max. Current = 2 mA, BNC socket

Inputs

Amperes, optical units corresponding to calibration data, factor, percent, log (depends on the measurement quantity)

Measurement range

8 (2.000 mA to 0.1 pA) manual or autorange

CW integration time

1 ms – 999.999 s

Pulse trigger

Key run / stop

for all channels (channel 1 – channel 8)

rising edge or trailing edge

Pulse integration time

1 ms – 999.999 s

Pulse pre trigger time

0 ms  – 400 ms

Offset

Correction range transcending

Parameter adjustment

Remote control or front panel keys (menu), adjusted values permanently stored (EEPROM)

Calibration information

Stored in EEPROM
max. 20 detectors (each 80 entries, e.g. wavelength, interpolation between the entries), manual calibration factor (keys)
E (illuminance) and Ø (total flux) each with one calibration entry

Logger memory

Max. 5957 entries each channel, stored in RAM

Measurement range
range
(A/V)
range
max.
slew rate
(10–90)%
P-9801-V0
slew rate
(10–90)%
P-9801-V02
slew rate
(10–90)%
P-9801-V03
gain error *
± offset error
(at 20 °C)
gain (A/V)
analogue
output
1x10-3 ± 2.500 mA 2 ms 20 ms 1 ms 0.2 % ± 0.001 mA 1x10-3
1x10-4 ± 250.0 µA 2 ms 20 ms 1 ms 0.2 % ± 0.1 µA 1x10-4
1x10-5 ± 25.00 µA 3 ms 20 ms 1 ms 0.2 % ± 0.01 µA 1x10-5
1x10-6 ± 2.500 µA 3 ms 20 ms 1 ms 0.2 % ± 0.001 µA 1x10-6
1x10-7 ± 250.0 nA 4 ms 20 ms 1 ms 0.2 % ± 0.1 nA 1x10-7
1x10-8 ± 25.00 nA 4 ms 20 ms 1 ms 0.2 % ± 0.01 nA 1x10-8
1x10-9 ± 2.500 nA 10 ms 20 ms 10 ms 0.5 % ± 2 pA 1x10-9
1x10-10 ± 250.0 pA 10 ms 20 ms 10 ms 0.5 % ± 2 pA 1x10-10


*
 Current calibration of each range by use of a precise current source with DAkkS calibration

Plug Types
DSUB 9pin
female
Function
2 TxD
3 RxD
5 GND
1-4-6 connected
7-8 connected


To connect the P-9801 to the RS232 interface of a PC a 1:1 cable has to be used (one side male connector, the other side female connector, no null modem cable!)

Measurement modes
Menu item Submenu item Function
Display Mode      Absolute displays the measurement respective of any offset and calibration factors programmed
Relative Percent displays the measurement as percentage of a reference value
Relative Factor displays the measurement referred to a reference value
Relative
Logarithmic
displays the measurement in dB in relation to a reference value
Dose accumulates the single readings and displays the result as exposure for measured quantity
No Display no display of the selected channel
Range  selects the range 1 to 8 or switches into the autorange mode (9)
Detector     Ampere shows the reading in ampere units
Manual allows entering a calibration factor manually
Select Table Entry selects calibration data table entry
Select Detector selects calibration data table
Recalibration performs recalibration of selected calibration table entry with a reference lamp
Offset  performs an automatic offset adjustment
Reference  sets a reference value, used in different display modes
Main Mode      CW measurement display of single channels
Color measurement display color mode
Pulse measurement of short and single light pulses
Pulse Color measurement of short and single light pulses, result displayed as color values
RS232 remote control RS232
IEEE488 remote control IEEE488
Setup        Measurement Time sets the integration time
Analog Out selects the channel switched to analog output
Dose Run Time sets the maximum time duration for exposure measurement
Dose Maximum sets the max. dose level for the exposure measurement mode
Display
Illumination
display backlight on / off
Display Digits adjusts the number of displayed digits (4, 5, or automatic)
Color Setup adjustments for color measurement
IEEE488 Address selection of address for IEEE488 interface

Miscellaneous
Front panel control

16 keys, menu system

Interface

RS232: 600 – 57600 Baud, 8 Data Bit, 1 Stop Bit, No Parity, Connector DSUB 9pins, female
IEEE488: AH1, SH1, L4, T4

temperature range

Operating: 5 °C to 40 °C
Storage: -10 °C to 50 °C

Dimensions

280 mm x 250 mm x 70 mm

Warranty

12 months

Accessories
Power Supply

 230 VAC / 7 VDC / 1.2 A or 120 VAC / 7 VDC / 1.2 A

Type Description File-Type Download
Datasheet P-9801 PDF
Produktname Product Image Description Show product
VL-3701 Detector head for the measurement of photopic illuminance in Lux [lx].

Features: f1 ≤ 3 %, f2 ≤ 1.5 %, 0.5 nA/lx, 20mm height, for the usage with Optometers and amplifiers, calibration certificate

VL-3702 Detector head for the measurement of photopic illuminance in Lux [lx].

Features: f1 ≤ 6 %, f2 ≤ 3 %, 0.5 nA/lx, 20mm height, for the usage with Optometers and amplifiers, calibration certificate

VL-3704 Detector head for the measurement of photopic illuminance in Lux [lx].

Features: f1 ≤ 5 %, f2 ≤ 3 %, 20pA/lx, 20mm height, for the usage with Optometers and amplifiers, calibration certificate

VL-3705 Detector head for the measurement of scotopic illuminance in Lux [lx].

Features: f1 ≤ 5 %, f2 ≤ 3 %, 0.2nA/lx, 20mm height, for the usage with Optometers and amplifiers, calibration certificate

PD-9310A High sensitive detector head for the measurement of photopic illuminance in Lux [lx].

Features: f1 ≤ 3 %, 2.8nA/lx, 20mm diffuser, for the usage with optometers and amplifiers, calibration certificate

PD-9310B High sensitive detector head for the measurement of photopic illuminance in Lux [lx].

Features: f1 ≤ 6 %, 2.8nA/lx, 20mm diffuser, for the usage with optometers and amplifiers, calibration

PD-9310B-N Very high sensitive detector head for the measurement of photopic illuminance in Lux [lx].

Features: f1 ≤ 3 %, 28nA/lx, no diffuser, for the usage with optometers and amplifiers, calibration

VL-1101 + UMPA-0.5-11-RD Detector head Module detector head for the measurement of photopic illuminance in Lux [lx].

Features: UMPA adapter for usage with integrating spheres, for the usage with optometers and amplifiers, calibration certificate

LDM-9810 Detector head to measure the photopic spot luminance in cd/m².

Features: selectable 20', 1° and 6° viewing angles, view finder, focus able achromatic lens, for the usage with Optometers and amplifiers, calibration certificate.

LDM-9901 Detector head to measure the photopic spot luminance in cd/m².

Features: 1.1° viewing angle, simple to use, very low stray light, for the usage with Optometers and amplifiers, calibration certificate.

VL-3701 with SRT-M37-L Detector head to measure the photopic illuminance in lx and the luminance in cd/m².

Features: front lenses with 1°, 2° or 5° viewing angle, for the usage with Optometers and amplifiers, calibration certificate

PD-9310 with SRT-M37-L High sensitive detector head to measure the photopic luminance in cd/m².

Features: front lense for 1°, 2°, 5° or 10° viewing angle, for the usage with Optometers and amplifiers, calibration certificate

VL-1101 Photometric detector head with VL-11 mount.

Features: modular detector for use with integrating spheres, front lenses etc. For use with optometers and signal amplifiers

ISD-5-VL Integrating sphere detector for luminous flux (lm) of 2π spot sources.

Features: 50mm dia, BaSO4 coating, 12.5mm dia port, for the usage with optometers and signal amplifiers, Calibration certificate

ISD-10-VL Integrating sphere detector for luminous flux (lm) of 2π spot sources.

Features: 100 mm dia, BaSO4 coating, 15 mm dia port, for the usage with optometers and signal amplifiers, Calibration certificate

TD-11VL01 Photometric, temperature stabilized detector with DP-11 mount.

Features: for use with integrating spheres, Operation temperature 50 °C, for use with optometers and signal amplifiers

PD-9304 Universal detector head for LASER power, illuminance and 400-1100 nm iiradiance.

Features: Si-photodiode with 1 cm², exchange able filters and cosine diffuor, for the usage with optometers and signal amplifiers

RW-3701 Detector head for the measurement of irradiance in W/m².

Features: spectral responsivity from 400-500nm (BLUE), cosine field-of-view, for the usage with optometers and amplifiers, calibration certificate.

RW-3702 Detector head for the measurement of irradiance in W/m².

Features: spectral responsivity from 700-800nm (RED), cosine field-of-view, for the usage with optometers and amplifiers, calibration certificate.

RW-3703 Detector head for the measurement of irradiance in W/m².

Features: spectral responsivity from 400-800nm (VIS), cosine field-of-view, for the usage with optometers and amplifiers, calibration certificate.

RW-3704 Detector head for the measurement of irradiance in W/m².

Features: spectral responsivity from 800-1000nm (NIR), cosine field-of-view, for the usage with optometers and amplifiers, calibration certificate.
RW-3705 Detector head for the measurement of irradiance in W/m².

Features: spectral responsivity from 400-1000nm (VISNIR), cosine field-of-view, for the usage with optometers and amplifiers, calibration certificate.

RW-3708 Detector head for the measurement of irradiance in W/m².

Features: spectral responsivity from 950-1700nm (NIR), cosine field-of-view, for the usage with optometers and amplifiers, calibration certificate.

UV-3701 Detector head for the measurement of irradiance of UV radiation in W/m².

Features: spectral responsivity from 315-400nm (UV-A), cosine field-of-view, for the usage with optometers and amplifiers, calibration certificate.
UV-3702 Detector head for the measurement of irradiance of UV radiation in W/m².

Features: spectral responsivity from 280-315nm (UV-B), cosine field-of-view, for the usage with optometers and amplifiers, calibration certificate.

UV-3703 Detector head for the measurement of irradiance of UV radiation in W/m².

Features: spectral responsivity from 200/250-280nm (UV-C), cosine field-of-view, for the usage with optometers and amplifiers, calibration certificate.

UV-3710 Detector head for the measurement of irradiance of UV radiation in W/m².

Features: spectral responsivity from 320-400nm (UV-A), cosine field-of-view, for the usage with optometers and amplifiers, calibration certificate.
UV-3711 Detector head for the measurement of irradiance of UV radiation in W/m².

Features: spectral responsivity from 280-320nm (UV-B), cosine field-of-view, for the usage with optometers and amplifiers, calibration certificate.

UV-3716 Detector head for the measurement of irradiance of UV radiation in W/m².

Features: spectral responsivity from 305-400nm (UV-A), cosine field-of-view, for the usage with optometers and amplifiers, calibration certificate.
UV-3717 Detector head for the measurement of irradiance of UV radiation in W/m².

Features: spectral responsivity from 315-400nm (UV-A), low cross talk from radiation > 400 nm, cosine field-of-view, for the usage with optometers and amplifiers, calibration certificate.

UV-3719 Detector head for the measurement of irradiance of UV radiation in W/m².

Features: spectral responsivity from 250-400nm (UV), cosine field-of-view, for the usage with optometers and amplifiers, calibration certificate.

UV-3720 Detector head for the measurement of irradiance of UV radiation in W/m².

Features: spectral responsivity from 240-320nm (UV), cosine field-of-view, for the usage with optometers and amplifiers, calibration certificate.

UV-3718 Detector head for the measurement of high irradiance of UV-C 254nm radiation in W/m².

Features: pre-aging for long time stability, cosine field-of-view, metal shielded cable, for the usage with optometers and amplifiers, calibration certificate.

RCH-102 Detector head for high intensity irradiation in UV or blue light curing processes.

Features: Separate light integrator and detector with rigid fiber coupling, (320-460)nm UVABLUE responsivity, wide viewing angle, for the usage with optometers and amplifiers, calibration certificate.
ISD-5-Si Integrating sphere detector for Laser power in W.

Features: 50 mm dia, 12.5 mm dia port, BaSO4 coating, 400 nm - 1100 nm responsivity, for the usage with optometers and signal amplifiers, Calibration certificate

ISD-5P-Si Integrating sphere detector for Laser power in W.

Features: 50 mm dia, 10 mm dia port, synthetic ODM98 coating, 400 nm - 1100 nm responsivity, for the usage with optometers and signal amplifiers, Calibration certificate

ISD-10-Si Integrating sphere detector for Laser power in W.

Features: 100mm dia, 15mm dia port, BaSO4 coating, 400-1100nm responsivity, for the usage with optometers and signal amplifiers, Calibration certificate

ISD-15-Si Integrating sphere detector for Laser power in W.

Features: 150mm dia, 38.1mm dia port, BaSO4 coating, 400-1100nm responsivity, for the usage with optometers and signal amplifiers, Calibration certificate

ISD-30 Integrating sphere detector for Laser power in W.

Features: 300mm dia, 101.6mm dia port, BaSO4 coating, 400-1100nm responsivity, for the usage with optometers and signal amplifiers, Calibration certificate

PD-11 series Detector head with DP-11 mount.

Features: modular detector for use with integrating spheres, front lenses etc, Si, SiLP, InGaAs, SiC, GaP photodiodes, for use with optometers and signal amplifiers

UV-3706 Detector head to measure irradiance W/m2 in Bilirubin phototherapy.

Features: Bilirubin actinic responsivity, cosine field-of-view, for usewith optometers, calibration certificate.

UV-3711-308 Detector head for the measurement of irradiance of 308nm Eximer Lasers in W/m².

Features: flat spectral responsivity besite 308nm. cosine field-of-view, dose measurement in conjuntion with P-9710-2 optometer, calibration certificate

UV-3709 Detector for Blue-light hazard measurements.

Features: Single-cell detector, BLH actinic irradiance, for the use with optometer, calibration certificate

UV-3725 Detector for the measurement of UV-C 254 nm irradiance in air disinfection applications.

Features: wide dynamic range for UV hazard and effective irradiance, wide angle cosine F.O.V. for straylight measurements, for the usage with optometers, calibration certificate.
PS-3701 Detector head for plant growth.

Features: 400-700nm PAR actinic irradiance, cosine field-of-view, for use with optometers, calibration certificate.

PS-3702 Detector head for plant growth.

Features: 320-500nm phototropism actinic irradiance, for use with optometers, calibration certificate.

PS-3703 Detector head for plant growth.

Features: 590-900nm photomorphogenesis actinic irradiance, for use with optometers, calibration certificate.

RW-37 with SRT-M37-L Detector heads to measure the irradiance in W/m² and the radiance in W/(m²*sr).

Features: front lenses with 1°, 2° or 5° viewing angle, for the usage with Optometers and amplifiers, calibration certificate
PRW-0505 Integrating sphere detector for radiant power in W of 2π spot sources.

Features: 400 - 1100 nm radiometric responsivity, 50 mm dia integrating sphere, 12.5 mm dia measurement port, for the usage with optometers and signal amplifiers, Calibration certificate
ISD-5P-SiUV Integrating sphere detector with UV-enhanced Si photodiode and 50 mm sphere for Laser power in W

Features: 250 nm - 1100 nm spectral responsivity, 10 mm dia measurement port, synthetic ODM98 coating, optional SMA Adapter, for the usage with Optometer and signal amplifiers, calibration certificate

ISD-5P-IGA Integrating sphere detector with InGaAs photodiode and 50 mm sphere for Laser power in W.

Features: 800 nm - 1800 nm spectral responsivity, 10 mm dia measurement port, synthetic ODM98 coating, optional SMA Adapter, for the usage with Optometer and signal amplifiers, calibration certificate

S-SDK-P9801 Software Development Kit for P9801 variants.
S-P9801 Application software for P9801 variants.
Article-Nr Modell Description Request / Compare
Product
15295256 P-9801-V01

Meter, with power supply and manual

15295254 P-9801-V02

Meter, with power supply and manual

15295255 P-9801-V03

Meter, with power supply and manual

Calibration
15300323 K-P9801-C

Current calibration and adjustment of all eight gain ranges in one channel of P-9801. Calibration certificate.

15300685 K-P9801n-C

Calibration of additional channel(s) together with K-P9801-C.

Options
15295279 P-98Z-01

Rack mount option to mount model P-9801 into 19in standard racks

Light Detectors

Please check the light detector datasheets for specification and purchasing information

Software
15298142 S-P9801

User software for P9801 and variants.

15298842 S-SDK-P9801

Software Development Kit for the implementation of the P9801 or variants into custom made software

Accessories
15295220 BHO-02

Hard case to carry and store P-9801 with light detector and accessories. Separate document partition.

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