Appendix C Technical data for the 7951
Page C.5
Inputs
Analog Quantity 4 off, each selectable as PRT (PT100) or 4-20mA
Options Option for extra 4-20mA inputs:
7951MAA*38*** (Klippon): 4 off
7951MAB*38*** (D-type): 6 off
Type 0/4 to 20mA
Span selection Unlimited (keyboard selectable)
Uncertainty ±0.008% of full scale at 25oC ± 0.001%/°C
Resolution 20-bit (1 part per million)
Sampling time 50ms per channel
(Temperature PRT) Using Analog Inputs 1 to 4.
Configuration 4-wire: Power return line connected to Analog Input GND
Temperature range -200°C to +220°C for 100Ω PRT
Uncertainty ± 0.05°C
Resolution ± 0.02°C
Sampling time 50ms per channel
Energisation <1mA average
(Meets BS1904 & IEC751, <1mW in the PT100)
Long term drift <20ppm per 1000 hours for first 1000 hours,
subsequently far less
Pulse Quantity 7951MAA****** (Klippon): 1 single/dual-pulse flowmeter.
7951MAB******(D-type): 2 single/dual-pulse flowmeter.
Options None
Pulse integrity checking IP 252/76, API Ch 5.5 Level A
Pulse interpolation /
Dual-pulse chronometry API MPMS Ch 4.6
Type Pulse count, maximum rise time 80ms
Input trigger level 0.5V RMS (1.2V p-p)
Max. voltage level 30V
Frequency range 0 to 5kHz (dual-pulse train), minimum pulse width 100μs
0 to 10kHz (single-pulse train), minimum pulse width 50μs
Time period
(Dens./Visc.) Quantity 4
Options None
Range 100μs to 5000μs
Accuracy ± 1ns typically, ± 10ns worst case
Resolution 2ns at 1kHz for 1-second sample