4
Measurement Characteristics
Operating Characteristics
5
DC Voltage
Function
Digits
Integration Time
Readings/s
Measurement Method:
1
dcV
7 /
2
200 plc
100 plc
20 plc
10 plc
1 plc
.15 (.125)
.3 (.25)
Continuously integrating multi-slope III
A-D Converter
1
Thermocouple
7 /
2
1
6 /
2
1.5 (1.25)
3 (2.5)
1
A-D Linearity:
0.00008% of reading + 0.00005% of range
6 /
2
1
5 /
2
25 (20.8)
100 (100)
250 (250)
1
5 /
2
0.2 plc
0.02 plc
Input Resistance:
100V (Ch1 only): 10 MΩ +- 1%
1mV through 10V: > 10 GΩ, in parallel with < 3.6 nF
1
4 /
2
1
Resistance
dcV1/DCV2
dcV 1-2
RTD
Thermistor
0.2 plc
7 /
2
200 plc
100 plc
20 plc
10 plc
1 plc
.075 (.062)
.15 (.125)
.75 (.625)
1.5 (1.25)
12.5 (10.4)
Input Bias Current: <50 pA at 25 °C
1
7 /
2
1
6 /
2
Injected Current: <50 nA pp at 50 or 60 Hz
1
6 /
2
Input Protection:
150 V peak any input terminal
to Channel 1 LO, continuous
1
5 /
2
50 (50)
41/2
0.02 plc
125 (125)
Channel-to-channel switching error (typical):
3 nV
Channel Isolation:
6
Chart Out ±Analog Outꢁ
Isolation between input channels >1010 Ω
System Speeds
Maximum output: 3V
Resolution: 16 bits
Configuration Rates: 26/s to 50/s
Autorange Rate (Volts): >30/s
ASCII reading to RS-232: 55/s
ASCII reading to GPIB: 250/s
Max. Internal Trigger Rate: 250/s
Earth Isolation:
350 V peak any input terminal to earth.
Impedance from any input terminal to earth
is >10 GΩ and <400 pF
Accuracy: 0.1% of output + 1 mV
Output Resistance: 1 kΩ 5%
Update rate: once per reading
Span and Offset: Adjustable
Standard Programming Languages
SCPI (IEEE 488.2), Keithley 181
Accessories Included
Maximum Voltage:
Channel 1 LO to Channel 2 LO, 150V peak
Max. Ext. Trig. Rate to Memory: 250/s
Triggering and Memory
Reading HOLD Sensitivity:
Resistance
10%, 1%, 0.1%, or 0.01% of range
Samples/Trigger: 1 to 50,000
Trigger Delay: 0 to 3600 s; 10 µs step size
External Trigger Delay: <1 ms
External Trigger Jitter: <500 µs
Memory: 1024 readings
Measurement Method:
Selectable 4-wire or 2-wire ohms. Current
Source referenced to Channel 1 LO input
4 ft low thermal cable with copper spade lugs,
Kelvin clip set, 4-wire shorting plug, user’s man-
ual, service manual, test report, contact cleaner,
and power cord.
Offset Compensation:
Used on all ranges except 100 kΩ and 1 MΩ.
Can be turned off if desired
Math Functions
Protection: 150 V peak
NULL (Channel 1 dcV, Channel 2 dcV,
Difference, Resistance, Temperature)
General Specifications
Open Circuit Voltage:
For Resistance and Low Power Resistance
<14 V. 20 mV, 100 mV, 500 mV selectable clamp
Front Panel Connection:
STATS (Min, Max, Average, Peak-Peak,
Standard Deviation, Number of readings)
Shielded, low thermal, 99% copper contacts.
Power Supply:
SCALE (Allows linear scaling as y = mx+b)
100V/120V/220V(230V)/240V +- 10%.
Temperature
CHART NULL (Establishes zero for rear panel
output)
Power Line Frequency:
SPRT:
45 Hz to 66 Hz and 360 Hz to 440 Hz.
Automatically sensed at power-on.
ITS-90 calibrated temperature with the range
of -190°C to +660°C
Filter ±Analog or Digital or Bothꢁ
Power Consumption:
Analog:
Thermocouple:
ITS-90 conversions of Type B, E, J, K, N, R, S, T
25VA peak (10W average).
Low pass 2 pole @ 13Hz, available for dcV
on
Operating Environment:
Thermistor: 5 kΩ
1 mV, 10 mV, 100 mV range
Full accuracy for 0 °C to 55 °C. Full accuracy
to 80% R.H. up to 30 °C.
RTD: Type α =.00385 and α =.00392. R0 from
4.9 Ω to 2.1 kΩ. ITS -90 (IEC-751) Callendar
Van Dusen conversion.
Digital:
Moving average filter, 10 (fast), 50 (medium),
or 100 (slow) reading averages.
Storage Environment:
-40 °C to 75 °C.
1
Measurement Noise Rejection 60 ±50ꢁ Hz
Size: 254.4 mm W x 374.0 mm L x 103.6 mm H
(10.02” W x 14.72” L x 4.08” H)
dc CMRR: 140 dB
ac CMRR: 70 dB
Integration Time
1
2
For 1 kΩ unbalanced in LO lead.
For power line frequency - 0.1%, Filters OFF. For
Digital Filter slow add 20 db, for medium or fast add
10 db for NPLC ³ 1.
Weight: 3 kg (6.5 lbs).
Normal Mode
Safety:
2
Rejection
3
4
5
For power line frequency - 1%, use 80 db,
for - 3% use 60 db.
Designed to CSA, UL-1244, IEC-1010.
RFI and ESD: CISPR 11.
3
200 plc/3.335 s (4 s)
100 plc/1.675 s (2 s)
20 plc/334 ms (400 ms)
10 plc/167 ms (200 ms)
2 plc/33.3 ms (40 ms)
1 plc/16.7 ms (20 ms)
<1 plc
110 dB
105 dB
100 dB
Speeds are for delay 0, Display OFF, Filters OFF,
Offset Compensation OFF.
3
3
Reading speeds for 60 Hz or (50 Hz), 100 mV
through 100 V ranges. 1 mV range 30/s MAX, 10
mV range 170/s MAX, thermocouple 120/s MAX.
Speeds are for NPLC 0.02, Delay 0, Display OFF,
Chart Out OFF.
95 dB3
90 dB
60 dB
0
6
3
AGILENT [ AGILENT TECHNOLOGIES, LTD. ]
