6 model 135/136 specifications @ 25 ˚c, Model 135/136 specifications @ 25 °c, Introduction – American Magnetics 135 & 136 Liquid Helium Level Instruments (CE-Marked) User Manual
Page 19
Rev. 3
7
Introduction
Specifications
1.6 Model 135/136 Specifications @ 25
°
C
Level Measurements
Resolution:
0.1%, 0.1 cm, or 0.1 in
Accuracy
a
:
±
0.5% of active sensor length
Linearity:
±
0.1%
Sensor Current:
75 mA nominal
Sensor Voltage:
approx. 70 VDC for 80" active sensor length
Operating Parameters
HI and LO Alarms:
0
% to 100% adjustable
HI/LO Alarm Relay Contact Ratings:
10 VA, 30 VAC or 60 VDC, 0.5 A
(normally open, closed on alarm)
Sample-and-Hold Period:
0.1 to 600.0 minutes or hours
A and B Control Setpoints:
0
% to 100% adjustable
Controller Output:
AC line voltage @ 1A max current
Fill Timer:
0.1 to 600.0 minutes or hours
0-10 Volt Analog Output
Integral Non-linearity:
±
0.012%
Resolution:
16 bits
Total Error:
±
1.1% for 0-10 V output
Voltage Drift (0-10 V):
100 ppm / °C
4-20 mA Analog Output @ 24 V
V
ext
Supply Range:
13-32 VDC (see
Appendix for diagram)
Integral Non-linearity:
±
0.012%
Resolution:
16 bits
Total Error:
±
0.25% for 4-20 mA output
Current Drift (4-20 mA):
75 ppm / °C
PSRR:
10
µ
A / V
Power Requirements
Primary
b
:
100-120 or 200-240 VAC
±
10%
50 - 60 Hz
Maximum Current:
50 VA for Model 135
1.3 A for Model 136
0RGHO
0RGHO
0RGHO