Temperature recording charts

In heat sterilization processes, a temperature record chart is made of each sterilization cycle with both dry and moist heat (i.e. autoclave) sterilizers this chart forms part of the batch documentation and is compared against a master temperature record (MTR). It is recommended that the temperature be taken at the coolest part of the loaded sterilizer. Further information on heat distribution and penetra-... 

Within the temperature range in which the third ester is eluted (on most columns, 110-140 C), sake two narks on the recorder chart noting the actual oven te) perature. 

Figure 1. The Ferkin-Elmer laboratory for thermal analysis. From left to right the DSC-1B differential scanning calorimeter with evolved gas analyzer, the TGS-1 thermobalance (top to bottom), the recorder chart control, model UU-1 temperature programmer control, and model TMS-1 control unit. At right is the model TMS-1 thermomechanical analyzer.

Set the hermetically sealed pressure cell 2 j containing a standard substance (lmg of DNT or 2mg of BPO) on the test apparatus, and heat at a rate of 10 0 C/min. Determine the exothermic start temperature and calorific value on the recording chart 4. Perform the test five times, and determine the average of the five runs. 

Temperature recorders . Multipoint, potentiometric,.. large-case circular chart.). 

The temperature of 2 cm of a chemical of the AC type, including every powdery chemical of the quasi-AC type, confined in the closed cell and subjected to the isothermal storage test at a 7, is recorded by means of an analog/digital temperature recorder. The digital output of the recorder is read to 0.1 K and is printed out every 30 min on the other hand, the analog signal of the recorder is recorded continuously with a T pen on the strip chart of the... 

A point, on the T, baseline recorded on the strip chart of the analog/digital temperature recorder, where the T pen sprang suddenly away from the T, baseline by reason that the thermocouple was pulled suddenly out of the orifice... 

At all events, however, once a powdery chemical of the quasi-AC type confined in the closed cell finishes melting, the chemical starts the quasi-autocatalytic reaction suddenly, even if the test is performed under isothermal conditions. It is, therefore, possible also in the isothermal storage test to locate without much difficulty the exothermic onset point, i.e., the point of time b , such as indicated in Fig. 7 in Section 3.3, on the strip chart of the temperature recorder in particular, it is possible and easy to do so, if the test is performed at a Ti, on the high temperature side, corresponding to a relatively small value of At vl Eq. (59), nAt = a/T, + b, holding for the induction period of the quasi-autocatalytic reaction of 2 cm of a powdery chemical of the quasi-AC type confined in the closed cell and subjected to the isothermal storage test. 

In the measurements of the adsorption equilibrium and intracrystalline diffusion data, the injection sample loop was first filled with a sample solution (water as solvent) of a known sorbate concentration by a syringe. The sample was then injected into the column after a stable base line in the recorder had been obtained. For each adsorbate at a given temperature, about 4 to 6 samples of different adsorbate concentration (CG from about 0.015 to 0.06 g/ml) and at different carrier flow rate (Q from 0.5 to 2.0 ml/min) were injected to give the corresponding response peaks at the outlet of the column. The response peaks were recorded and then directly read from the recording chart and input to a DEC-20 computer for further analysis. Figure 2 shows some recorded response peaks from the silicalite LC column for ethanol, n-propanol and n-butanol. 

Sterilization by moist heat is suitable only for water-wettabie materials and aqueous solutions. Both temperature and pressure should be used to monitor the process. The temperature recorder should normally be independent of the controller, and there should be an independent temperature indicator, the reading from which is routinely checked against the chart recorder during the sterilization period. For sterilizers fitted with a drain at the bottom of the chamber, it may also be necessary to record the temperature at this position, throughout the sterilization period. There should be... 

Where temperature control is important, temperature recording devices should be utilized, with recording charts retained as part of the batch record. For example, reactors may require narrow temperature ranges for consistent operation, and when recorders are absent, the manufacturer should justify their absence. 

There is increased use of computer systems to initiate, monitor, adjust and otherwise control manufacturing processes. These operations may be accompanied by recording charts that show key parameters (e.g., temperature) at suitable intervals, or even continuously throughout the process. In other cases, key... 

Each heat sterilization cycle should be recorded on a temperature-time chart or by other suitable automatic means. The time-temperature record should form part of the batch record. Chemical or biological indicators may be used in addition to but should not take the place of physical controls. 

Each heat sterilization cycle should be recorded on a temperature-time chart or by other suitable automatic means. 

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