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MDM300 User Manual
54
97122 Issue 16.2 June 2022
APPENDIX B
Appendix B
Datalog Status Display
When the status of the current log file is displayed, see
Figure 38, the
ST
column in
the current log file display represents the instrument’s status at the time that each log
point is recorded.
File CR270309
INT RH
EXT. EXT_DP
INTVAL 05 Sec
D# 090327
T# 123606
#
106
107
108
109
110
INT
-
100.0
26.8
26.2
25.9
25.8
25.5
-90.0
-80.0
-70.0
-60.0
EXT
ST
0028
0028
0028
0028
0028
Figure 40
Current Datalog File Display
This column shows a hexadecimal representation of the instrument’s 16-bit status
register shown below in
Figure 39. Bit 1 is the least significant bit. The four most
significant bits 13...16 are for Michell Instruments’ service use and so the first character
in any MDM300 ST display will always read 0.
Status register bit position
16
15
14
13 12 11
10
9
8
7
6
5
4
3
2
1
N/A N/A N/A N/A 0/1 0/1 0/1 0/1 0/1 0/1 0/1 0/1 0/1 0/1 0/1 N/A
Figure 41
MDM300 Status Register
For the example given for each of the log plots shown in
Figure 38 (Hex 0028), the
output pattern of the status register will be as shown in
Figure 40.
Status register bit position
16
15
14
13 12 11
10
9
8
7
6
5
4
3
2
1
N/A N/A N/A N/A
0
0
0
0
0
0
1
0
1
0
0
N/A
Figure 42
MDM300 Status Register (Hex 28)
Each of the error bits set high (1) represents a specific status or error condition. In this
example, bits 4 and 6 are set high indicating that two (status) conditions exist.
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