Model DT335-0700
Dual RTD/Resistance Input Transmitter w/USB
Acromag, Inc. Tel: 248-295-0880
- 37 -
http://www.acromag.com
- 37 -
https://www.acromag.com
2)
The equipment shall be installed in an enclosure that provides a degree of
protection not less that IP 54 and only accessible with the use of a tool in
accordance with EN/IEC
60079‐
0.
3)
Transient protection should be provided and set to a level not exceeding
140% of the peak rated voltage value at the supply terminals to the
equipment.
Reliability Prediction
Reliability Prediction
MTBF (Mean Time Between Failure):
MTBF in hours using MIL-HDBK-217F, FN2.
Per
MIL-HDBK-217, Ground Benign, Controlled, G
B
G
C
Temperature
MTBF (Hours)
MTBF (Years)
Failure Rate (FIT
1
)
25°C
776,253 hrs
88.6 years
1,288.2
40°C
531,612 hrs
60.7 years
1,881.1
1
Note:
FIT refers to Failures in 10
9
hours.
Configuration Controls
Software Configuration Only via USB or USB-OTG
This dual transmitter drives two channels of current or voltage proportional to input
signals taken from differential voltage measurements across resistance input sensors
(RTD or resistances wired to TB1/CH1 or TB3/CH2). No switches or potentiometers
are used to adjust this transmitter. Its behavior as a dual isolated signal
amplifier/transducer is determined via programmed variables set using a temporary
USB connection to a host computer or laptop running a Windows-compatible
configuration software program specific to the transmitter model. This software
provides the framework for digital control of all configuration and calibration
parameters, and this information is stored in non-volatile memory.
Refer to Operation Step-By-Step in the Technical Reference section of this manual
for detailed information on available software control of this model.
REVISION HISTORY
The following table shows the revision history for this document:
Release Date
Version
EGR/DOC
Description of Revision
17-JUN-2019
A
BC/ARP
Initial Release.
27-JAN-2020
B
BC/ARP
Added MTBF Figures.
15-SEP-2020
C
CAP/ARP
Added cULus, ATEX, IECEx, and FCC approvals.
28 JAN 2022
D
CAP/AMM
Added Altitude: Up to 2000 meters (Environmental
Section)
