Gossen MetraWatt METRAHIT ENERGY TRMS System Multimeter Operating Instructions Manual page 73

HYSt – Hysteresis (parameter for memory mode operation)
The hysteresis setting allows for efficient use of memory space.
During memory mode operation, new measured data are only
saved if they deviate from the previously stored value by an
amount which exceeds the selected hysteresis value.
Hysteresis can be selected in steps from 1 to 10,000 digits. These
digits are related to the measuring range as follows: The position of
the set digit in the specified hysteresis value corresponds to the
same position within the measuring range, although counting is
started at the left
Example: A specified hysteresis of 00100 for the 600.00 V measu-
ring range means that only those measured values which deviate
from the last measured value by more than 001.00 V are saved to
memory.
Note
Due to the fact that the value is specified in digits (highest
place all the way to the left), and thus depends on the mea-
suring range, it's advisable to use the function with a fixed
measuring range only.
MEASURE
1nFo   store
...
SETUP
FUNC
hyst set: 00000 ... 10000
ENTER
GMC-I Messtechnik GmbH
FUNC
  hyst
...
ENTER
FUNC
 
ENTER
triG – Trigger Conditions for Memory Mode Operation
The setting StorE > triG SEt = sto-ou / sto-in / off can be used to
specify how measured value recording is started and stopped:
• trig = off: Recording is started with Store > Start and stopped
with Store > Stop.
• trig = sto-ou: Recording is started as soon as a measured value
occurs which is outside of the selected measuring limits, and is
stopped as soon as the measuring limits are once again com-
plied with, or the selected recording period has elapsed.
• trig = sto-in: Recording is started as soon as a measured value
occurs which is within a specified band, and is stopped as soon
as this is no longer the case, or after the maximum recording
period has elapsed.
This band is specified with the help of the L_triG lower limit and the
H_triG upper limit. Querying takes place in the event that trig off is
selected. Band widths are specified in digits, and 60,000 digits
corresponds to the upper range limit. It's thus advisable to perform
measurement with a fixed measuring range. Due to the fact that
rapid momentary value acquisition (see section 4.5.1) has a large
measuring range span, limit values of greater than 60,000 digits
can be selected.
Device and Measuring Parameters
73