16 
10. 
11. 
Logging control (Model 806) -- Selects mode of operation, al- 
lowing the scan cycle to be started at the following intervals: 
1 sec, 3 sec, 5 sec, 10 sec, 1 min, 10 min, 30 min, plus a 
continuous cycling rate. Also controls the presentation of the 
data as follows: printed tape, punched tape, both printed and 
punched tape. 
Output control (Model 805) -- Provides control of the tape 
punch. 
Digital clock (Model 956) -- Provides basic time base for log- 
ging control, as well as a visual display of hours, minutes, 
and seconds. Also enters this information on both printed and 
punched tapes before and after every cycle (where a cycle is 
defined as 26 temperature readings, 3 calibrate readings, and 
1 depth reading). Clock uses a 10 kc/s temperature- 
compensated crystal controlled oscillator and has a stability 
of 1 part in 10° per week. In order to actuate strip-chart re- 
corder operation pens, this clock also provides a contact 
closure that closes at the beginning of each minute and stays 
closed for 20 seconds. 
Printed tape recorder (Model 9053) -- An electromechanical 
printer, which prints in decimal form at speeds up to 5 lines 
per second. Figure 9 shows a typical sample of this tape for 
one cycle, including temperatures, pressure readings, times, 
channel identification numbers, and polarity of voltmeter 
reading. 
Tape punch, BRPE-2 type punch -- Punches temperature 
readings, pressure reading, and times for each cycle. How- 
ever no channel identification or voltmeter polarity indications 
are punched. This information is provided in a 7-level code 
compatible with a CDC-1604 digital computer. The format 
also includes a carriage return before every reading, so that 
data from the punched tapes could easily be spot-checked by 
running the tapes through a Flexowriter. 
