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Appendix E: Specifications
Appendix E: Specifications
HERMIT 2000 with Lithium Battery
General
Dimensions
25.4 x 40.6 x 28 cm (10 x 16 x 11 in.)
Weight
10 kg (20 lb.)
Operating & storage
temperature
-40ºC to +70ºC (-40ºF to +158ºF)
Transducer Input(s)
Type
4 to 20 mA, 2 or 3 wire
Source voltage
+20 to +28 VDC, pulsed
Source current
100 mA max
Source pulse width
50 mSEC typical
Input resistance
185 ohms typical
Accuracy
±0.2% of full scale
Resolution
±0.015% of full scale
Stability
±0.005% of full scale/ºC
Data Sampling
Memory type
Non-volatile EEPROM
Memory capacity
16K standard, expandable to 512K
Data point capacity
8,000 standard, expandable to 256,000
Linear sampling rate
Programmable 2 sec to 1440 min
Log sampling rate
0.5 sec from 0 to 20 sec
1 sec from 20 to 60 sec
12 sec from 60 to 600 sec
2 min from 10 to 100 min
20 min from 100 to 1000 min
200 min from 1000 to 10,000 min
1440 min from 10,000 min
programmable 1 min to 24 hs after 10 min
Battery
Type
Lithium inorganic
Expected life
Greater than 100,000 data points
External Power Input
Input voltage
+12 VDC to +18 VDC (+13.8 VDC
nominal)
Input current
50 mA typical, 500 mA peak
Alarm Contacts
Contact voltage
30 VDC or 30 VAC max
Contact current
1 ampere max
RS232C Interface
Output voltage swing
±4 VDC min, ±5 VDC typical
Input voltage range
±15 VDC max, ±3 VDC min
Baud rate
Programmable 300 to 9600 baud
Character length
Programmable 7 or 8 bits
Parity
Programmable Odd, Even, or None
End-of-line sequence
Programmable CR or CR/LF
Handshake
CTS or XON/XOFF (DC1/DC3)
HERMIT 2000 with Lead-Acid Battery
General
Dimensions
25.4 x 40.6 x 28 cm (10 x 16 x 11 in.)
Weight
10.7 kg (23.6 lb.)
Operating and storage
temperature
-15ºC to +40ºC (5ºF to 104ºF)
Battery
Type
Lead acid
Capacity
6.4 Ampere-hours
The usage that can be expected from a single battery charge de-
pends on the temperature and the type of probe being used, as shown
in the table below:
Probe Type
Temperature Charge Life*
Level, Function
-15ºC
6 months or 72,000 data points
Level, Function
+25ºC
6 months or 96,000 data points
Level, Function
+40ºC
6 months or 25,000 data points
Dual
-15ºC
6 months or 5,800 data points
Dual
+25ºC
6 months or 7,700 data points
Dual
+40ºC
6 months or 2,000 data points
* Assumptions: Two hours of set-up time per month; Download on
battery power at 9600 baud
External Power Input
Input voltage
+12 VDC to +18 VDC (+13.8 VDC
nominal)
Input current
50 mA typical, 500 mA peak
Power adapter can power unit and charge batteries at the same time.
A fully discharged battery will require 24 hours to charge.