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Section 5
shares a common RAM pool. The meter allocates the actual amount of bytes available for each stor-
age function dependent on the demands of each facility. Therefore, an unusually large Datalogger file
may reduce the amount of site storage memory available. Storing several inactive site setups may
reduce the available logging capacity.
If you receive a [Memory Full!] message when you try to save a Site Setup, then you will have to delete
an obsolete Site Setup or clear the Datalogger Memory to make room. Another Datalogger memory
consideration applies to dual-channel systems, when both measurement channels are actively log-
ging data. Dual-channel meters store logged data from BOTH channels in a common file so you must
include Site ID for each line to identify the applicable measurement channel.
The 1020 also offers a Memory Map and Defragmenting command in the Meter Facilities area of the
menu as an aid in visualizing and maximizing the efficient utilization of your meter's memory resources.
5.6
REFERENCE TABLES
The following tables provide reference data that may be required during the Site Setup.
SONIC VELOCITY (in meters/sec) FOR COMMON LIQUIDS @ 68
Liquids/Oils
Acetate, Butyl (n)
Acetate, Ethyl
Acetate, Methyl
Acetate. Propyl
Alcohol
Alcohol, Butyl (n)
Alcohol, Ethyl
Alcohol, Methyl
Alcohol, Propyl (i)
Alcohol, Propyl (n)
Benzene
Benzol, Ethyl
Butyrate, Ethyl
Carbon Tetrachloride
Diethyl Ketone
SONIC VELOCITY FOR PURE WATER @ VARIOUS TEMP. (meters/sec)
Liquid
Water
Vs(m/s)
1270
1180
1150
1180
1440
1270
1180
1120
1170
1220
1330
1340
1170
938
1310
Deg. C
Deg. F Vs (m/s)
0
32
1402
10
50
1447
20
68
1482
30
86
1509
40
104
1529
50
122
1543
60
140
1551
70
158
1555
80
176
1554
90
194
1550
100
212
1543
110
230
1532
Liquids/Oils
Ethanol
Ethylene Glycol
Gasoline
Glycerine
Linalool
Linseed Oil
Methylethyl Ketone
Motor Oil (SAE 20/30)
Paraffin Oil
Pentane
Petroleum
Trichlorethylene
Transformer Oil
Turpentine
Liquid
Deg. C Deg. F Vs (m/s)
Water
120
130
140
150
160
170
180
190
200
220
240
260
5-7
1020NFM-1D
°
F
Vs(m/s)
1180
1620
1250
1920
1400
1770
1210
1487
1420
1010
1290
1050
1390
1280
248
1519
266
1503
284
1485
302
1466
320
1440
338
1412
356
1390
374
1360
392
1333
428
1268
464
1192
500
1110
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