Checkline ESM301 User Manual
Page 12
Model ESM301 / ESM301L Version 2 Test Stand
User’s Guide
12
4.7.1 Preload (PRELOAD)
This setting corresponds to the test stand’s response to an initial load, referred to as a preload. The
crosshead can stop and/or zero the travel display when the preload has been reached. This function is
useful for applications such as spring testing, elongation testing, and tensile and compression testing of
various materials. For details about setting the preload value, refer to Section 4.7.2.
Default setting: OFF
Available settings: STOP, STOP/ZERO, ZERO/GO, OFF
Label Description
+ or –
Cycles through the available settings listed below:
STOP
Crosshead stops when preload has been reached
STOP, ZERO
Crosshead stops when preload has been reached, then zeroes the travel display
ZERO, GO
Travel display is zeroed when preload has been reached, crosshead does not stop
ENTR
Returns to the Test Parameter Setup menu
ESC
Exits the parameter without saving changes
4.7.2 Preload Value
(PRELD %FS)
This setting corresponds to preload value, defined as a percentage of the force gauge’s full scale in lbF
units. The test stand’s response, as described in the previous section, occurs when this value has been
reached.
Note:
In low force applications, consider test stand vibration and crosshead acceleration, as they can be
prominent enough to produce a force exceeding the preload value.
Default setting: 1%
Available settings: 0 – 100%
Label Description
+ or –
Cycles through the available settings
ENTR
Returns to the Test Parameter Setup menu
ESC
Exits the parameter without saving changes
4.8 Load Holding
This setting directs the test stand to dynamically adjust the crosshead position to maintain a programmed
force. The force is programmed as a set point in a Series 5 force gauge (refer to the user’s guide for
details). If the CYCLING option has been enabled, load holding will be active for the period of time as
defined in the Upper Dwell and Lower Dwell settings. If CYCLING has not been enabled, load holding will
continue indefinitely.
Default setting: OFF
Available settings: ON, OFF
P R E L O A D : Z E R O , G O
E S C
− + E N T R
P R E L D %F S : 0 1 . 0
E S C
− + E N T R